James h



(No Model.)

J. H. ANTHONY.

SEWING MACHINE SHUTTLE.

No. 302,971. Patented Aug. 5, 1884.

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INYENTUFL WITNESSES.

NITED STATES PATENT Prion.

' J AMES H. ANTHONY, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO THEHOUSEHOLD SEWING MACHINE COMPANY, OF SAME PLACE.

SEWING-MACHINE SHUTTLE.

5PEGIPICATION forming part of Letters Patent No. 302,971, dated August5, 1884.

Application filed March 10, 1881. (N model.)

To ail whom it may concern:

Be it known that I, JAMES H. ANTHONY, of the city and county ofProvidence, and State of Rhode Island, have invented a new and usefulImprovement in Sewing-Machine Shuttles; and I hereby declare that thefollowing specification, taken in connection with the accompanyingdrawings, forming a part of the same, is a full,clear, and exactdescription thereof.

This invention relates to a sewingmachine shuttle having an open rearend, and a selfthreading slot extending from the heel of the shuttletoward the point thereof, for the pur- [5 pose of quickly and easilyintroducing'the thread.

Before my invention, shuttles having self threading slots which are openat the heel of the shuttle have been'constructed. as far as I am aware,so that the self-threading slot has had an upward and forward directionfrom the heel of the shuttle toward the point. In the use of suchshuttles considerable annoyance and loss of time have resulted from thebreakage of the upper thread, due to theentrance into said slot of theloop in the upper thread while it was being drawn up to form a stitch.

The object of this invention is to give to the 0 rear portion of theself-threading slot such an inclination with relation to the face of theheel of the shuttle as will allow the loop in the upper thread to freeitself from said slot should the thread enter the slot as it is drawn 5upward to form the stitch.

To this end the invention consists in giving the self-threading slot adownward and forward inclination from the heel of the shuttle,

and in continuing the slot in an upward and 40 forward direction, thepoint atwhich the change of direction takes place being located at sucha distance from or with such relation to the point where the thread isdelivered from the shuttle as to prevent the loop of the upper threadfrom drawing the slack of the shuttle-thread. into the rear portion ofthe slot during the passage of the shuttle through-said loop.

Referring to the drawings, Figure 1 repre- 5 sents a perspective view ofa shuttle embodying my invention with the bobbin in place Fig. 2 shows aside view and partial section of the same with the bobbin removed, thelower edge in both figures indicating the bot tom or lower side of theshuttle.

A is the shuttle-case, which has a central bore adapted to receive abobbin, B, which bobbin is intended to revolve on its heads in said borein awell-known manner. The selfthreading slot 1) Z) extends from theheel a of '60 the shuttle toward the point thereof. The part b of saidslot has a downward and forward direction from the heel a, and the part-b of the slot has an upward and forward direction from its junctionwith the part b. The point I) of such junction, or the point where theslot changes in direction, is intended to be located at such a distancefrom or with such relation to the point where the thread isdelivercd-fron1 the shuttle as to prevent the loop of the upper threadfrom drawing the slack of the shuttle'thread into the rear portion orpart bof the slot during the passageof the shuttle through said loop. Ina shutt1ehaving such a slot all danger of the upper thread being brokenby entering the slot is avoided, as is likewise the breakage of theshuttle-thread by being drawn into the slot by the loop in the upperthread while the shuttle is passing through said loop.

Although I have shown the two parts b I) of the slot as meeting at asharp angle, bf, yet the two parts of the slot may be joined by a curvedportion, as will be readily understood.

It is obvious that my invention, which con- 8 5 sists of the shuttleprovided with the inclined openended slot, may be used with any kind oftension device, provided only that the tension-spring, in case one beused, be so applied as not to close the end of the slot, which isdesigned to be open at all times, so as to permit the bobbin-th read tobe drawn in through said open end of the slot.

"What I claim, and desire to secure by Letters Patent, is-

1. A shuttle having a self-threading slot which shall at all times beleft open to permit the bobbin-thread to be drawn therein, said slotextending from the heel of the shuttle downward and forward,substantially as de- I00 changes being located as described withrelation to the point where the shuttle-thread is 1c delivered,substantially as-set forth.

JAMES H. ANTHONY.

scribed, whereby the needle-thread is pre I 1 WVitn esses: W. H.THURsTON, I S. J. MURPHY.

